Publications by authors named "Mi Jung Lee"
Background: In children and young adults, tumors in the chest and thoracic wall exhibit a wide variety of types, making it challenging to differentiate between benign and malignant cases before invasive histopathological examination.
Purpose: To evaluate the utility of apparent diffusion coefficient (ADC) for discriminating malignant thoracic masses in children and young adults.
Material And Methods: This retrospective study included chest magnetic resonance imaging (MRI) scans in patients aged <30 years.
Development of Machine Learning Models to Categorize Life Satisfaction in Older Adults Living Alone.
J Prev Med Public Health
October 2024
Objectives: This study aimed to identify factors associated with life satisfaction by developing machine learning (ML) models to predict life satisfaction in older adults living alone.
Methods: Data were extracted from 3,112 older adults participating in the 2020 Korea Senior Survey. We employed 5 ML models to classify the life satisfaction of older adults living alone: logistic Lasso regression, decision tree-based classification and regression tree (CART), C5.
Beyond videoconferencing: enhancing remote home assessments with 3D modeling technology.
Disabil Rehabil Assist Technol
November 2024
Occupational therapists in the Veterans Health Administration have transitioned from in-person to videoconferencing for home assessments, benefiting Veterans living in remote and rural areas. However, videoconferencing has limitations, including restricted field of view and poor video quality, affecting hazard identification accuracy. This study aims to introduce and evaluate a three-dimensional (3D) model as an alternative technology for remote home assessments.
View Article and Find Full Text PDFArticle Synopsis
- The study evaluated the impact of a Quality Threshold (QT) implementation on liver shear wave elastography (SWE) in children during free breathing, aiming to improve measurement accuracy.
- Phantom measurements and clinical evaluations were conducted, revealing that QT led to more reliable elasticity measurements and better differentiation of fibrosis grades in patients with biliary atresia.
- The findings suggest that using QT helps reduce errors in measurement by excluding low-quality pixels, although some artifacts, like artificial stripe patterns, remained problematic.
Article Synopsis
- Quantitative imaging examinations are crucial for determining the effectiveness of liver disease treatments in both children and adults, but pediatric liver disease has distinct characteristics requiring tailored noninvasive imaging approaches.
- Ultrasound is commonly used as the initial imaging study for pediatric diffuse liver disease, while advanced techniques like attenuation imaging and ultrasound elastography are becoming important for assessing conditions like fatty liver.
- MRI is also a vital tool despite the need for sedation in young patients, allowing for detailed quantitative analysis, and the article reviews various quantitative imaging methods for different liver conditions in children, noting special considerations for growth and motion during tests.
Objectives: To improve pubertal bone age (BA) evaluation by developing a precise and practical elbow BA classification using the olecranon, and a deep-learning AI model.
Materials And Methods: Lateral elbow radiographs taken for BA evaluation in children under 18 years were collected from January 2020 to June 2022, retrospectively. A novel classification and the olecranon BA were established based on the morphological changes in the olecranon ossification process during puberty.
Purpose: This study aimed to predict high-risk neuroblastoma among neuroblastic tumors using radiomics features extracted from MRI.
Materials And Methods: Pediatric patients (age≤18 years) diagnosed with neuroblastic tumors who had pre-treatment MR images available were enrolled from institution A from January 2010 to November 2019 (training set) and institution B from January 2016 to January 2022 (test set). Segmentation was performed with regions of interest manually drawn along tumor margins on the slice with the widest tumor area by two radiologists.
Background: The relationship between early life factors and childhood pulmonary function and structure in preterm infants remains unclear.
Purpose: This study investigated the impact of bronchopulmonary dysplasia (BPD) and perinatal factors on childhood pulmonary function and structure.
Methods: This longitudinal cohort study included preterm participants aged ≥5 years born between 2005 and 2015.
In this study, we explore how the strategic positioning of conductive yarns influences the performance of plated knit strain sensors fabricated using commercial knitting machines with both conductive and non-conductive yarns. Our study reveals that sensors with conductive yarns located at the rear, referred to as 'purl plated sensors', exhibit superior performance in comparison to those with conductive yarns at the front, or 'knit plated sensors'. Specifically, purl plated sensors demonstrate a higher sensitivity, evidenced by a gauge factor ranging from 3 to 18, and a minimized strain delay, indicated by a 1% strain in their electromechanical response.
View Article and Find Full Text PDFScoliosis is a three-dimensional spinal deformity, and paraspinal muscles play an important role as stabilizers of the spinal curve. In this prospective study, we compared elasticity changes in the paraspinal muscles of adolescent patients with scoliosis after surgery or bracing. Elasticity was measured on the concave and convex sides of the paraspinal muscles at the apex of the curve at the beginning of treatment and 6 and 12 months after treatment.
View Article and Find Full Text PDFObjectives: The aims of the study are to describe the frequency that functional goals are documented on the Minimum Data Set and to identify resident characteristics associated with meeting or exceeding discharge goals.
Methods: We selected Medicare fee-for-service beneficiaries admitted to a skilled nursing facility within 3 days of hospital discharge from October 1, 2018, to December 31, 2019 ( N = 1,228,913). The admission Minimum Data Set was used to describe the discharge goal scores for seven self-care and 16 mobility items.
Home modification is essential in helping older adults age in place safely and independently. The purpose of this study was to examine the impact of housing location and disability status on home modification projects among older adults using the 2019 American Housing Survey Data. The study found that recent home modification strategies were significantly different according to older adults' housing locations and health status.
View Article and Find Full Text PDFAddressing non-response data for standardized post-acute functional items.
BMC Health Serv Res
September 2023
Background: The post-acute patient standardized functional items (Section GG) include non-response options such as refuse, not attempt and not applicable. We examined non-response patterns and compared four methods to address non-response functional data in Section GG at nation-wide inpatient rehabilitation facilities (IRF).
Methods: We characterized non-response patterns using 100% Medicare 2018 data.
Objectives: This study aimed to identify demographic and housing features associated with functional difficulties experienced by older adults in their homes.
Participants: Individuals aged ≥ 65 years who completed American Housing Survey (AHS) questionnaires. We selected one random person per household and excluded participants with missing data for the 12 AHS functional challenge items.
Background: Contrast-enhanced ultrasonography (CEUS) of the bowel wall has been suggested as an alternative imaging modality for the follow-up of children with Crohn's disease. To demonstrate the feasibility and clinical usefulness of CEUS in the estimation of Crohn's disease activity in children with endoscopy as the reference standard.
Method: In this prospective study, 30 pediatric patients with Crohn's disease (24 males and 6 females; median age 14 years) underwent CEUS from December 2020 to August 2021.
Background: Sarcopenia can be associated with the disease etiologies other than degenerative processes, such as neurologic disease including cerebral palsy, myelomeningocele, or Duchenne muscular dystrophy, even in children. Although the relationship between neurologic disease and scoliosis or ambulatory function is known, the mediators affecting scoliosis or gait function in these patients are unclear, an example might be sarcopenia. This study aimed to assess the degree of sarcopenia in young patients with neurologic diseases using computed tomography (CT), and analyze the correlation between sarcopenia and scoliosis or ambulatory function.
View Article and Find Full Text PDFObjectives: The objective of this study was to examine the patient characteristics and features associated with the initial rehabilitation utilization with a particular emphasis on outpatient rehabilitation after total knee arthroplasty (TKA) among 2016-2018 Texas Medicare enrollees.
Design: This is a retrospective cohort study. We used chi-square tests to examine the variability in patient demographic and clinical characteristics across the different post-acute rehabilitation settings after TKA.
Objective: To evaluate the feasibility of ultrasound shear wave elastography (SWE) for predicting hepatic fibrosis and native liver outcomes in patients with biliary atresia.
Materials And Methods: This prospective study included 33 consecutive patients with biliary atresia (median age, 8 weeks [interquartile range, 6-10 weeks]; male:female ratio, 15:18) from Severance Children's Hospital between May 2019 and February 2022. Preoperative (within 1 week from surgery) and immediate postoperative (on postoperative days [PODs] 3, 5, and 7) ultrasonographic findings were obtained and analyzed, including the SWE of the liver and spleen.
Previous literature has suggested physical exercise may improve cognitive impairments and mitigate depressive symptoms. However, few studies examined the impact of resistance exercise intervention on cognition and depression in older Chinese Americans. The purpose of this pilot study was to assess the effects of resistance exercise training on cognitive performance and depressive symptoms among community-dwelling older Chinese Americans.
View Article and Find Full Text PDFImportance: Overactive bladder (OAB) syndrome and urinary incontinence, age, and comorbid burden are strong risk factors for falls in women. Less is known about their cumulative effects on fall risk in a urogynecologic population.
Objective: The purpose of this study was to investigate the effects of coexisting OAB, older age, and comorbidities on risk of falling among treatment seeking women with pelvic floor disorders.
Structural defects at the surface and within the bulk of perovskite films hinder efficient energy conversion in solar cells due to the loss of charge carriers through non-radiative recombination. Post-passivation approaches have been proposed in an attempt to eliminate surface defects, with bulk defects being rarely studied. Moreover, it is of interest to investigate the difference in the perovskite crystal growth with and without simultaneous defect passivation.
View Article and Find Full Text PDFSolution-based blended polymer materials are promising for electronic applications in many fields. However, determining a controllable method to achieve electronically active organic films through the practical liquid deposition process is very challenging. In this study, we suggest employing hybrid binary organic mixture inks (an insulating polymer polystyrene (PS)) and an organic semiconductor (6,13-bis(triisopropylsilylethnyl)pentacene (TIPS-pentacene)) to manage and enhance the characteristics of TIPS-pentacene organic layers using a bar-coating method.
View Article and Find Full Text PDFObjective: To understand the sociodemographic, geographical, and clinical characteristics of rural veterans utilizing home modification (HM) healthcare services under the Home Improvement Structural Alterations (HISA) program, to compare these characteristics between rural and urban veteran users, to estimate the costs of HMs performed, and to present distance that users traveled to HISA-prescribing medical facilities within the Veterans Health Administration (VHA).
Background: Accessible housing is in short supply. HMs allow veterans with disabilities (VWDs) to remain living at home rather than enter institutional-type settings.